Università degli studi di Modena e Reggio Emilia

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Teachers

Luke MIZZI
Andrea SPAGGIARI

Overview

The main aims of the course are the attainment of knowledge in mechanical design and product development

Part 1. Mechanical Design (Prof. A. Spaggiari) 6 CFU

- Elements of continuum mechanics
- Introduce principles of mechanical design
- Influence of economic factors on design solutions
- Fabrication methods of mechanical parts
- Evaluation of mechanical components
- Solving technical problems in design

Part 2. Product Development (Dr L. Mizzi) 3 CFU
- Analyse Client Needs and Requisites and establish product requirements and metrics
- Generate conceptual solutions to solve technical problems and compare and evaluate conceptual solutions
- Transform concept to realisable product

Admission requirements

Good level of spoken and written Italian, ability to use logic and principles of elementary mathematics and experimental sciences.
Knowledge of technical drawings in 2D and 3D is required, in particular those covered in the course Computer-Aided Design (CAD) 3d.

Course contents

Part 1: Mechanical Design (6 CFU)

1. MECHANICAL DESIGN AND INDUSTRIAL PRODUCTION (0.5 CFU)
1.1 Steps in industrial product development and relevance of mechanical design
1.2 Processing of industrial products and influence of economic factors

2. MATERIAL CHARACTERISATION AND CLASSIFICATION (1 CFU)
2.1 Classification, properties and nomenclature of materials in construction
2.2 Fundamental material characteristics

3. BASIC PRINCIPLES OF STRUCTURAL MECHANICS (1 CFU)
3.1 Cardinal equations of statics
3.2 General states of stresses, principal stresses e Mohr circles
3.3 Stresses in Beams
3.4 Stresses in thin, pressurised membranes
3.5 Stresses in thick pressurised cylinders
3.6 Hooke's Law and Elastic Constants governing stresses and strains

4. STRESS CONCENTRATION ANALYSIS (1 CFU)
4.1 Influence of notches on stress concentration
4.2 Stress concentration factors
4.3 Effect of notches on strength of machine components
4.4 Notch factors

5. SAFETY FACTORS (1 CFU)
5.1 Safety factors and Ideal stresses

6. FATIGUE PERFORMANCE OF MATERIALS AND MACHINE COMPONENTS (1 CFU)
6.2 Conventional Fatigue Test: Inversion fatigue limit
6.3 Influence of mean stress on fatigue limit: Goodman-Smith Diagram
6.4 Effect of load and geometry on fatigue limit
6.5 Influence of surface treatment and processing on fatigue

7. MACHINE DESIGN (1 CFU)
7.1 Shafts
7.2 Rotating Discs in Engines
7.3 Ball-Bearings
7.4 Gears
7.5 Springs

Part 2: Product Development (3 CFU)

1. PRODUCT DEVELOPMENT IN INDUSTRY (0.5 CFU)
1.1 Stages of Product Development
1.2 Efficiency of Process of Product Development
1.3 Relation between cost, time and quality

2. MECHANICAL DESIGN IN PRODUCT DEVELOPMENT (0.5 CFU)
2.1 Relevance and composition of project development team
2.2 Simultaneous Engineering
2.3 Relationship between project team composition and management structure
2.4 Types of industrial design projects

3. CONCEPTUAL DESIGN (0.5 CFU)
3.1 Declaration of Aims
3.2 Client Needs
3.3 Specific Objectives: metrics, values, matrices, house of quality
3.4 Generation of concepts
3.5 Evaluation and selection: qualitative and quantitative scoring matrices
3.6 Final specifications

4. SYSTEM DESIGN (0.5 CFU)
4.1 Product architecture
4.2 Definition of architecture
4.3 Implications of design

5. DETAILED DESIGN (0.5 CFU)
5.1 Optimisation of design
5.2 Relationship between function, form, material and cost of production
5.3 Design for small-scale production
5.4 Design for mass production
5.5 Design for assembly

6. PROTOTYPING (0.5 CFU)
6.1 3D Modelling (CAD)
6.2 Use of Solidworks software

The teacher is available for final projects related to the topics of the course.

Teaching methods

The course includes exercises on the theoretical concepts covered in class. Attendance in presence is not obligatory. Lessons are carried out in Italian.

Assessment methods

The final evaluation will be conducted through a 2h written exam at the end of the semester where knowledge of theoretical concepts will be evaluated through the solution of exercises related to practical problems in mechanical design. The students will be allowed to consult books or course material for the design task.

Learning outcomes

At the end of course, the students should obtain the following competencies and knowledge. In particular:

(1) Knowledge and Comprehension
Principles of machine design and mechanical engineering:

- Economic factors influencing mechanical design
- Fabrication methods
- Evaluation of machine components
- Overcome basic mechanical design challenges
- Interpret client needs
- Establish specific metrics and targets
- Generate conceptual solutions
- Evaluate concepts
- Choose and transform concept in realisable product

(2) Ability to apply knowledge gained
Ability to apply knowledge in the fields of mechanical engineering and machine design using structural mechanics.

(3) Independent decision-making
Knowledge on how to evaluate results and make decisions based on quantitative results.

(4) Communicative ability
This course does not explicitly cover topics of communicative ability beyond factors which influence mechanical design and the terminology employed in this field.

(5) Ability to absorb knowledge
The course is aimed at imparting knowledge on the applied field of mechanical design at the primary and secondary university level and, in order to follow the course, basic knowledge of mechanical engineering is required.

Readings

K.T. Ulrich, S.D.Eppinger: "Progettazione e sviluppo di prodotto" McGraw-Hill.
E. Dragoni: "Lezioni di Costruzione di Macchine" Pitagora Editrice.